Variable frequency drives (VFDs), also known as variable speed drives (VSDs), are used to modulate the speed of motors in various applications, from hydronic water pumping to VAV fan units to vacuum ...
In the September and October 2010 issues, POWER Contributing Editor David Daniels explored the causes and damage mechanisms of condenser tube leaks (“Taming Condenser Tube Leaks,” Part I and Part II).
Bob Forty’s venerable HVACR experience (detailed in The NEWS, “Aluminum vs. Copper: The Great Condensing Coil Debate,” Feb. 18, 2002) and comparisons with our industry’s all-copper, all-aluminum, and ...
In a power plant, the primary use of vacuum systems is to remove air and other noncondensable gases from the shell side of the condenser in order to maintain design heat transfer and thus design ...
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